#! /bin/sh
# prefix command to run stuff from our programs directory
# Copyright (C) 1998-2002  Henry Spencer.
# 
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 2 of the License, or (at your
# option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
# 
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
# for more details.
#

test $IPSEC_INIT_SCRIPT_DEBUG && set -v -x

# where the private directory and the config files are
IPSEC_EXECDIR="${IPSEC_EXECDIR-@IPSEC_EXECDIR@}"
IPSEC_LIBDIR="${IPSEC_LIBDIR-@IPSEC_LIBDIR@}"
IPSEC_SBINDIR="${IPSEC_SBINDIR-@IPSEC_SBINDIR@}"
IPSEC_CONFS="${IPSEC_CONFS-@IPSEC_CONFS@}"

IPSEC_DIR="$IPSEC_LIBDIR"
export IPSEC_DIR IPSEC_CONFS IPSEC_LIBDIR IPSEC_EXECDIR

# standardize PATH, and export it for everything else's benefit
PATH="${IPSEC_SBINDIR}":/sbin:/usr/sbin:/usr/local/bin:/bin:/usr/bin
export PATH

# things not to be listed in --help command list
DONTMENTION='^(ipsec|_.*|.*\.old|.*~)$'

# version numbering (details filled in by build)
# Possibly should call a C program to invoke the version_code() function
# instead, but for performance's sake, we inline it here (and only here).
version="@IPSECVERSION@"

# export the version information
IPSEC_VERSION="$version"
export IPSEC_VERSION

# function for the funky user/kernel version stuff
fixversion() {
	if test -f /proc/net/ipsec_version
	then
	stack=" (klips)"
	kv="`awk '{print $NF}' /proc/net/ipsec_version`"
	else
                if test -f /proc/net/pfkey
                then
			stack=" (netkey)"
                        kv="`uname -r`"
                else
			if test -f /mach_kernel
			then
				stack=" (OSX)"
                        	kv="`uname -r`"
			else
                        	kv="(no kernel code presently loaded)"
			fi
                fi
	fi
	if test " $kv" != " $version"
	then
	version="U$version/K$kv"
	fi
	version="$version$stack"
}

case "$1" in
'')
	echo "Usage: ipsec command argument ..."
	echo "Use --help for list of commands, or see ipsec(8) manual page"
	echo "or the Openswan documentation for names of the common ones."
	echo "Most have their own manual pages, e.g. ipsec_auto(8)."
	echo "See <http://www.openswan.org> for more general info."
	exit 0
	;;
--help)
	echo "Usage: ipsec command argument ..."
	echo "where command is one of:"
	for f in `ls -1 ${IPSEC_LIBDIR} ${IPSEC_EXECDIR} | egrep -v -i "$DONTMENTION"`
	do
		if test -x $IPSEC_LIBDIR/$f || test -x $IPSEC_EXECDIR/$f
		then
			echo "	$f"
		fi
	done
	echo
	echo "Most of these have their own manual pages, e.g. ipsec_auto(8)."
	echo "See also the ipsec(8) manual page."
	exit 0
	;;
version|--version)
	fixversion
	echo "Linux Openswan $version"
	echo "See \`ipsec --copyright' for copyright information."
	if [ -f $IPSEC_LIBDIR/vendor.txt ]
	then
	    echo VENDOR is $(cat $IPSEC_LIBDIR/vendor.txt)
	fi
        # this might be provided by a packaging system.
	if [ -f $IPSEC_LIBDIR/distro.txt ]
	then
	    cat $IPSEC_LIBDIR/distro.txt
	fi
	exit 0
	;;
--versioncode)
	fixversion
	echo "$version"
	exit 0
	;;
--copyright)
	set _copyright
	# and fall through, invoking "ipsec _copyright"
	;;
--directory)
	echo "$IPSEC_DIR"
	exit 0
	;;
--confdir)
	echo "$IPSEC_CONFS"
	exit 0
	;;
--*)
	echo "$0: unknown option \`$1' (perhaps command name was omitted?)" >&2
	exit 1
	;;
esac

cmd="$1"
shift

path="$IPSEC_EXECDIR/$cmd"

if test ! -x "$path" 
then
    path="$IPSEC_LIBDIR/$cmd"
    if test ! -x "$path"
    then
	echo "$0: unknown IPsec command \`$cmd' (\`ipsec --help' for list)" >&2
	exit 1
    fi
fi

exec $path "$@"
